Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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INTAGLIO PRINTING PRESS
TECHNICAL FIELD
The present invention generally relates to an intaglio printing press of the
type comprising an intaglio cylinder and an ink wiping system with a rotating
wiping roller assembly contacting a circumference of the intaglio cylinder for
wiping excess ink from the surface of the intaglio cylinder, a rotational
speed of
the wiping cylinder being adjustable with respect to a rotational speed of the
intaglio cylinder.
BACKGROUND OF THE INVENTION
European Patent Publication No. EP 0 633 134 Al discloses an intaglio
printing press comprising a wiping cylinder whose rotational speed is
controlled
and adjusted with respect to a rotational speed of a plate cylinder by way of
corresponding independent motors.
A problem with the above solution resides in the fact that, in case of
failure of an independent drive, the associated system and function become
inoperative and cannot be exploited further unless the defective drive is
replaced by a new drive, which process is typically time-consuming and
involves substantial downtimes which negatively affect productivity.
An improved and more robust approach is therefore required.
SUMMARY OF THE INVENTION
A general aim of the invention is therefore to provide an intaglio printing
press of the above-mentioned-type comprising means to adjust a rotational
speed of the wiping roller assembly, which solution is more robust than the
solutions known in the art.
A further aim of the invention is to provide such a solution which is as
compact as possible in order to facilitate the integration thereof in the
intaglio
printing press.
Still another aim of the invention is to provide such a solution which can
be efficiently used to adjust a rotational speed of a wiping cylinder with
respect
to an intaglio cylinder of an intaglio printing press.
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These aims are achieved thanks to the adjustable drive unit defined in
the claims.
There is accordingly provided an intaglio printing press comprising an
intaglio cylinder and an ink wiping system with a rotating wiping roller
assembly
contacting a circumference of the intaglio cylinder for wiping excess ink from
the
surface of the intaglio cylinder, a rotational speed of the wiping cylinder
being
adjustable with respect to a rotational speed of the intaglio cylinder,
wherein the
intaglio printing press comprises an adjustable drive unit, which adjustable
drive
unit is interposed between the wiping roller assembly acting as a rotating
output
body of the adjustable drive unit and a driving gear coupled to the intaglio
cylinder and acting as a rotating input body of the adjustable drive unit. The
adjustable drive unit is designed to allow selected adjustment of a rotational
speed of the wiping roller assembly with respect to a rotational speed of the
driving gear. In an adjusting state of the adjustable drive unit, driving into
rotation of the wiping roller assembly is adjusted by means of an adjustment
motor of the adjustable drive unit to change the rotational speed of the
wiping
roller assembly with respect to the rotational speed of the intaglio cylinder.
In a
non-adjusting state of the adjustable drive unit, the adjustment motor is
inoperative and driving into rotation of the wiping roller assembly is
performed
exclusively mechanically via the adjustable drive unit, the wiping roller
assembly
rotating at a defined rotational speed with respect to the rotational speed of
the
intaglio cylinder.
In accordance with the invention, it shall therefore be appreciated that the
adjustment motor is only operative in the adjusting state of the adjustable
drive
unit, i.e. the adjustment motor is only used for the purpose of adjusting a
rotational speed of the wiping roller assembly with respect to the rotational
speed of the intaglio cylinder. In the non-adjusting state, the adjustment
motor is
totally inoperative and the wiping roller assembly is driven into rotation
exclusively mechanically via the adjustable drive unit. In other words, any
failure
of the adjustment motor will not have any impact on the normal operation of
the
intaglio printing press. In addition, since the adjustment motor is only
operative
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in the adjusting state of the adjustable drive unit, usage of the adjustment
motor
is reduced, leading to an extended usability.
In accordance with a preferred embodiment of the invention, the
adjustable drive unit comprises an adjustable mechanical transmission unit
having a drive input coupled to and rotating together with the driving gear, a
drive output coupled to and rotating together with the wiping roller assembly,
and a control input coupled to and driven into rotation by the adjustment
motor.
In accordance with a preferred embodiment of the invention, the
adjustable mechanical transmission unit is designed as a planetary gear unit
comprising a ring gear acting as the drive input of the planetary gear unit, a
star
gear disposed centrally with respect to the ring gear and acting as the
control
input of the planetary gear unit, and a plurality of planet gears interposed
between and meshing with the ring gear and the star gear, which plurality of
planet gears are carried by a planet carrier coaxial with the ring gear and
star
gear and acting as the drive output of the planetary gear unit.
Advantageously, the rotational speed of the wiping roller assembly is
adjustable, in the adjusting state of the adjustable drive unit, within a
range of
+ 20 % and - 20 % with respect to a nominal rotational speed of the wiping
roller
assembly in the non-adjusting state of the adjustable drive unit.
In a preferred variant, the intaglio printing press further comprises a
retractable coupling mechanism coupled between a drive output of the
adjustable drive unit and a driving head part of the wiping roller assembly,
which
retractable coupling mechanism is operable to release the driving head part of
the wiping roller assembly during a maintenance operation.
In a further variant, the wiping roller assembly is coupled to an output of
the adjustable drive unit via a spherical bearing.
Also claimed is an adjustment system designed to allow adjustment of
the rotational speed of a wiping roller assembly of the aforementioned
intaglio
printing press.
Further advantageous embodiments of the adjustable drive unit and of
the printing press form the subject-matter of the dependent claims and are
discussed below.
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BRIEF DESCRIPTION OF THE DRAWINGS
Other features and advantages of the present invention will appear more
clearly from reading the following detailed description of embodiments of the
invention which are presented solely by way of non-restrictive examples and
illustrated by the attached drawings in which:
Figure 1 is a side-view of an intaglio printing press according to a first
embodiment of the invention ;
Figure 2 is an enlarged schematic side view of the printing unit of the
intaglio printing press of Figure 1 ;
Figure 3 is a schematic partial side view of an intaglio printing press
according to a second embodiment of the invention ;
Figure 4 is a schematic partial side view of an adjustable drive unit for
driving and adjusting rotation of a wiping roller assembly of an ink wiping
system of the intaglio printing press of Figures 1 and 2 or of Figure 3 in
accordance with a preferred embodiment of the invention ;
Figure 5 is an enlarged partial side view of the adjustable drive unit of
Figure 4;
Figure 6 is a schematic front view of the adjustable drive unit of Figure 4
as seen from a side intended to be coupled to a driving head part of the
wiping
roller assembly ; and
Figure 7 is a schematic sectional view of an adjustable mechanical
transmission unit designed as a planetary gear unit as used in the embodiment
of Figures 4 to 6, the sectional view being along plane B-B indicated in
Figure 6.
DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION
The present invention will be described in the particular context of the
application to an intaglio printing press as used for the production of
banknotes
and like security documents.
Within the context of the present invention, the expression "intaglio
cylinder", when used, designates either a cylinder whose surface is provided
with intaglio patterns engraved directly onto the circumference of the
cylinder or
of a cylinder sleeve, or a plate cylinder carrying on its circumference at
least
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one intaglio printing plate with engraved intaglio patterns (the second
solution
being now more common in the art). In the following description, it will be
assumed for the sake of illustration that the intaglio cylinder is a plate
cylinder
carrying several intaglio printing plates on its circumference. In this
context, the
5 expression "chablon cylinder" (which is equivalent to the expression "colour-
selector cylinder" also used in the art) is to be understood as designating a
cylinder with raised portions whose purpose is to selectively transfer ink
patterns to the circumference of the plate cylinder, whether indirectly (as
shown
in Figures 1 and 2) or directly (as shown in Figure 3). Furthermore, the
expression "ink-collecting cylinder" (which is in particular relevant to the
embodiment of Figures 1 and 2) designates within the context of the present
invention a cylinder whose purpose is to collect inks from multiple chablon
cylinders (which have been inked by associated inking devices) before
transferring the resulting multicolour pattern of inks onto the plate
cylinder. In
the art of intaglio printing, the expression "Orlof cylinder" is also
typically used
as an equivalent to the expression "ink-collecting cylinder".
Figures 1 and 2 schematically illustrate an intaglio printing press
according to a first embodiment of the invention, which printing press is
generally designated by reference numeral 1.
More precisely, Figure 1 shows a sheet-fed intaglio printing press 1
comprising a sheet feeder 2 for feeding sheets to be printed, an intaglio
printing
unit 3 for printing the sheets, and a sheet delivery unit 4 for collecting the
freshly-printed sheets. The intaglio printing unit 3 includes an impression
cylinder 7, a plate cylinder 8 (in this example, the plate cylinder 8 is a
three-
segment plate cylinder carrying three intaglio printing plates), an inking
system
comprising an ink-collecting cylinder, or Orlof cylinder, 9 (here a three-
segment
blanket cylinder carrying a corresponding number of blankets) for inking the
surface of the intaglio printing plates carried by the plate cylinder 8 and an
ink
wiping system 10 for wiping the inked surface of the intaglio printing plates
carried by the plate cylinder 8 prior to printing of the sheets.
The sheets are fed from the sheet feeder 2 onto a feeder table and then
onto the impression cylinder 7. The sheets are then carried by the impression
6
cylinder 7 to the printing nip between the impression cylinder 7 and the plate
cylinder 8 where intaglio printing is performed. Once printed, the sheets are
transferred away from the impression cylinder 7 for conveyance by a sheet
transporting system 15 in order to be delivered to the delivery unit 4. The
sheet
transporting system 15 conventionally comprises a sheet conveyor system with
a pair of endless chains driving a plurality of spaced-apart gripper bars for
holding a leading edge of the sheets (the freshly-printed side of the sheets
being oriented downwards on their way to the delivery unit 4), sheets being
transferred in succession to a corresponding one of the gripper bars.
During their transport to the sheet delivery unit 4, the freshly printed
sheets are preferably inspected by an optical inspection system 5. In the
illustrated example, the optical inspection system 5 is advantageously an
inspection system as disclosed in International Publication No.
WO 2011/161656 Al,
which inspection system 5 comprises a transfer mechanism and an
inspection drum located at the transfer section between the impression
cylinder
7 and chain wheels of the sheet transporting system 15. The optical inspection
system 5 could alternatively be an inspection system placed along the path of
the sheet transporting system 15 as described in International Publications
Nos.
WO 97/36813 Al, WO 97/37329 Al, and WO 03/070465 Al. Such inspection
systems are in particular marketed by the Applicant under the product
designation NotaSavee.
Before delivery, the printed sheets are preferably transported in front of a
drying or curing unit 6 disposed after the inspection system 5 along the
transport path of the sheet transporting system 15. Drying or curing could
possibly be performed prior to the optical inspection of the sheets.
Figure 2 is a schematic view of the intaglio printing unit 3 of the intaglio
printing press 1 of Figure 1. As already mentioned, the printing unit 3
basically
includes the impression cylinder 7, the plate cylinder 8 with its intaglio
printing
plates, the inking system with its ink-collecting cylinder 9, and the ink
wiping
system 10.
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The inking system comprises in this example five inking devices 20, all of
which cooperate with the ink-collecting cylinder 9 that contacts the plate
cylinder
8. It will be understood that the illustrated inking system is adapted for
indirect
inking of the plate cylinder 8, i.e. inking of the intaglio printing plates
via the ink-
collecting cylinder 9. The inking devices 20 each include an ink duct 21
cooperating in this example with a pair of ink-application rollers 22. Each
pair of
ink-application rollers 22 in turn inks a corresponding chablon cylinder 23
which
is in contact with the ink-collecting cylinder 9. As is usual in the art, the
surface
of the chablon cylinders 23 is structured so as to exhibit raised portions
corresponding to the areas of the intaglio printing plates intended to receive
the
inks in the corresponding colours supplied by the respective inking devices
20.
As shown in Figures 1 and 2, the impression cylinder 7 and plate cylinder
8 are both supported by a stationary (main) frame 50 of the printing press 1.
The inking devices 20 (including the ink duct 21 and ink-application rollers
22)
are supported in a mobile inking carriage 52, while the ink-collecting
cylinder 9
and chablon cylinders 23 are supported in an intermediate carriage 51 located
between the inking carriage 52 and the stationary frame 50. Both the inking
carriage 52 and the intermediate carriage 51 are advantageously suspended
under supporting rails. In Figure 1, reference numeral 52' designates the
inking
carriage 52 in a retracted position.
The twin-carriage configuration of the intaglio printing press 1 illustrated
in Figures 1 and 2 corresponds in essence to the configuration disclosed in
International Publications Nos. WO 03/047862 Al, WO 2011/077348 Al,
WO 2011/077350 Al and W02011/077351 Al, all assigned to the present
Applicant.
The ink wiping system 10, on the other hand, typically comprises a
wiping tank, a wiping roller assembly 11 supported on and partly located in
the
wiping tank and contacting the plate cylinder 8, cleaning means for removing
wiped ink residues from the surface of the wiping roller assembly 11 using a
wiping solution that is sprayed or otherwise applied onto the surface of the
wiping roller assembly 11, and a drying blade contacting the surface of the
wiping roller assembly 11 for removing wiping solution residues from the
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surface of the wiping roller assembly 11. A particularly suitable solution for
the
ink wiping system 10 is disclosed in International Publication No.
WO 2007/116353 Al.
Figure 3 is a schematic partial side view of an intaglio printing press
according to a second embodiment of the invention, which intaglio printing
press is designated by reference numeral 1*, for the sake of distinction.
In contrast to the first embodiment shown in Figures 1 and 2, the intaglio
printing press 1* of Figure 3 comprises a printing unit 3* with a direct
inking
system (i.e. without any ink-collecting cylinder), the chablon cylinders,
designated by reference numerals 23*, cooperating directly with the plate
cylinder 8.
The inking devices, designated by reference numerals 20*, each include,
in this example, an ink duct 21*, an ink-transfer roller 24*, and a pair of
ink-
application rollers 22* adapted to cooperate with the associated chablon
cylinder 23*. The inking devices 20* are supported on an inking carriage 56
that
is adapted to move between a working position (shown in Figure 3) and a
retracted position (not shown) in a way similar to the inking carriage 52 of
Figures 1 and 2. The impression cylinder 7, plate cylinder 8, chablon
cylinders
23* and ink wiping system 10 are all supported in a stationary frame 55 of the
intaglio printing press 1*.
Both the intaglio printing press 1 of Figures 1 and 2 and the intaglio
printing press 1* of Figure 3 may be provided with an adjustable drive unit in
accordance with the invention.
According to the invention which will be described in reference to a
preferred embodiment thereof which is illustrated by Figures 4 to 7, such an
adjustable drive unit is interposed between the wiping roller assembly 11
(which
wiping roller assembly 11 acts as a rotating output body of the adjustable
drive
unit) and a driving gear, designated by reference numeral 100 in Figures 4 to
7
(which driving gear 100 acts as a rotating input body of the adjustable drive
unit).
In accordance with the invention, the adjustable drive unit is designed to
allow selected adjustment of a rotational speed of the wiping roller assembly
11
,
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with respect to a rotational speed of the intaglio cylinder 8. More precisely,
in
accordance with the invention, in an adjusting state of the adjustable drive
unit,
driving into rotation of the wiping roller assembly 11 is adjusted by means of
an
adjustment motor of the adjustable drive unit. In a non-adjusting state of the
adjustable drive unit, the adjustment motor is inoperative and the driving
into
rotation of the wiping roller assembly 11 is performed exclusively
mechanically
via the adjustable drive unit, the wiping roller assembly 11 rotating at a
defined
rotational speed with respect to the rotational speed of the intaglio cylinder
8.
More specifically, referring to the preferred embodiment of Figures 4 to 7,
a purpose of the adjustable drive unit is to form part of an adjustment system
designed to allow for an adjustment of the rotational speed of the wiping
roller
assembly 11 with respect to the rotational speed of the intaglio cylinder 8.
Preferably, the adjustable drive unit is designed to allow adjustment of the
rotational speed of the wiping roller assembly 11, in the adjusting state of
the
adjustable drive unit, within a range of + 20 %
and
- 20 % with respect to a nominal rotational speed of the wiping roller
assembly
11 in the non-adjusting state of the adjustable drive unit.
Figure 4 is a schematic partial side view of an adjustable drive unit,
designated by reference numeral 25, which is interposed between the wiping
roller assembly 11 (acting as the rotating output body) and a driving gear 100
coupled to the intaglio cylinder 8 (acting as the rotating input body). In
this
example, the adjustable drive unit 25 comprises the driving gear 100, an
adjustable mechanical transmission unit, identified by reference numeral 505,
interposed between the driving gear 100 and the wiping roller assembly 11, and
an adjustment motor 700.
In accordance with this preferred embodiment, the adjustable mechanical
transmission unit is advantageously designed as a planetary gear unit 505
having a drive input coupled to and rotating together with the driving gear
100, a
drive output coupled to and rotating together with the wiping roller assembly
11,
and a control input coupled to and driven into rotation (when in an adjusting
state) by the adjustment motor 700.
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In a non-adjusting state of the adjustable drive unit 25, the adjustment
motor 700 is inoperative and driving into rotation of the wiping roller
assembly
11 is performed exclusively mechanically via the adjustable drive unit 25
(i.e. via
the planetary gear unit 505), the wiping roller assembly 11 rotating at a
nominal
5 rotational speed defined by the rotational speed of the driving gear 100.
Figure 4 shows that the adjustment motor 700 is supported and secured
by means of a (first) support member 950 onto the same machine frame as the
wiping roller assembly 11, namely the stationary machine frame 50 in Figures
1,
2 or 55 in Figure 3. A further (second) support member 910 is provided in
order
10 to support and secure one end of the adjustable mechanical transmission
unit
505 onto the relevant machine frame (50 in Figures 1, 2 or 55 in Figure 3) ,
the
adjustable mechanical transmission unit 505 being held (via a suitable bearing
arrangement) at the other end (i.e. on the side of the drive input of the
planetary
gear unit) by the (first) support member 950.
Figure 4 also shows an outer casing 510 and lateral member 515 of the
planetary gear unit 505, both elements 510, 515 being secured to one another
and to the driving gear 100.
On a drive output side, the planetary gear unit 505 is coupled to a driving
head part 11a of the wiping roller assembly 11 via an output member 610.
Preferably, such coupling is performed, as illustrated, via a retractable
coupling
mechanism 800 coupled between a drive output (i.e. output member 610) of the
adjustable drive unit 25 and the driving head part 11a of the wiping roller
assembly 11, which retractable coupling mechanism 800 is operable to release
the driving head part lla of the wiping roller assembly 11 during a
maintenance
operation as this will be explained in reference to Figure 5.
In the illustrated example, the adjustment motor 700 is coupled to the
control input of the planetary gear unit 505 via a worm drive 720, thereby
allowing the adjustment motor 700 to be supported at a right angle with
respect
to the axis of rotation of the planetary gear unit 505.
Figure 5 is an enlarged partial side view of the adjustable drive unit 25 of
Figure 4 illustrating more clearly the retractable coupling mechanism 800 that
is
interposed between the output member 610 of the planetary gear unit 505 and
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the driving head part 11a of the wiping roller assembly 11. The retractable
coupling mechanism 800 basically comprises an input member 810 which is
secured to the output member 610 and thus rotates together with the drive
output of the planetary gear unit 505 and a slideable output member 820 that
is
designed to cooperate with the driving head part 11a of the wiping roller
assembly 11.
The coupling section between the driving head part 11 a of the wiping
roller assembly 11 and the slideable output member 820 is as such known in
the art (see for instance European Patent Publication No. EP 0 881 072 Al). A
particularity resides in the fact that the slideable output member 820 can be
retracted away from the driving head part 11 a (as schematically indicated by
the
arrow in Figure 5) during a maintenance operation. This is in particular meant
to
allow the wiping roller assembly 11 to be removed from the printing press
during
cleaning operations or for the purpose of being replaced by a new wiping
roller
assembly. The slideable movement of the output member 820 can conveniently
be carried out by means of a pneumatic or hydraulic actuating system.
Members 810 and 820 are shaped in such a way that, in the illustrated
example, the output member 820 can slide with respect to the input member
810. Appropriate guidance of the output member 820 is ensured by guiding the
output member 820 inside the support member 910.
Figure 5 further shows that the wiping roller assembly 11 is
advantageously coupled to the output of the adjustable drive unit 25 via a
spherical bearing (or like bearing), in order to allow for some tolerance
regarding the respective orientations of the axis of rotation of the wiping
roller
assembly 11 and of the axis of rotation of the planetary gear unit 505.
Indeed,
due to the operation of the wiping roller assembly 11, the axis of rotation
thereof
does not necessarily coincide with the axis of rotation of the planetary gear
unit
505. In the illustrated example, a spherical bearing 615 is thus formed
between
the output member 610 and components 600, 605 of the planetary gear unit
505 that act as a planet carrier of the planetary gear unit 505. Some
tolerance is
also ensured at the location where the slideable output member 820 engages
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with the driving head part lla of the wiping roller assembly 11, i.e. by
providing
some radial play at the relevant location.
Figure 6 is a schematic front view of the adjustable drive unit 25 of Figure
4 as seen from a side intended to be coupled to the driving head part lla of
the
wiping roller assembly 11. Figure 7 is a schematic sectional view of the
planetary gear unit 505 as taken along plane B-B indicated in Figure 6 and
which more clearly shows the configuration of the planetary gear unit 505.
Visible in Figure 7 is the outer casing 510 which is secured to the driving
gear 100 (not shown in Figure 7) and to the lateral member 515 of the
planetary
gear unit 505. In this example, the lateral member 515 is formed of two parts
and is designed to act as a ring gear RG (with internal teeth) and drive input
of
the planetary gear unit 505.
Also shown is the adjustment motor 700 which drives a control shaft 730
penetrating into a central portion of the planetary gear unit 505, which
control
shaft 730 is coupled to the output of the adjustment motor 700 via a worm
drive
720. The extremity of the control shaft 730, inside the planetary gear unit
505 is
designed to act as a star gear SG (with external teeth) and control input of
the
planetary gear unit 505.
Interposed between the ring gear RG and the star gear SG are a plurality
of planet gears PG. Three such planet gears PG are provided, which are
distributed at intervals of 120 about the star gear SG. The planet gears PG
engage on the one hand with the external teeth of the star gear SG and on the
other hand with the internal teeth of the ring gear RG.
The planet gears PG are supported onto a planet carrier PC which is
mounted so as to rotate about the same axis of rotation as the ring gear RG
and
star gear SG. The planet carrier PC here acts as the drive output of the
planetary gear unit 505. The planet carrier PC consists in this example of an
intermediate member 600 that is supported onto a pair of ball bearings inside
the outer casing 510. A central member 605 is further secured to a central
portion of the intermediate member 600 to act as one part of the spherical
bearing 615 that has already been described above. Rotation of the planet
carrier PC is transmitted to the output member 610 via a suitable
13
interconnection between the output member 610 and central member 605, while
allowing for some angle (if any) between the axis of rotation of the output
member 610 and the axis of rotation of the planet carrier PC.
It will be appreciated that the planet gears PG and the planet carrier PC
are conveniently located within a housing formed by the outer casing 510 and
the lateral member 515, thereby suitably protecting these elements from
exposure to the environment.
In the non-adjusting state (i.e. when the adjustment motor 700 in
inoperative), the planetary gear unit 505 merely acts as a reducer stage, the
wiping roller assembly 11 being driven into rotation exclusively mechanically
via
the above-described arrangement so as to rotate at a nominal rotational speed
dictated by the driving gear 100. In the adjusting state (i.e. when the
adjustment
motor 700 is operative), the planetary gear unit 505 acts as a differential
stage
with the wiping roller assembly 11 being driven into rotation at a rotational
speed which is a differential function of the rotational speed of the driving
gear
100 as transmitted to the ring gear RG and of the rotational speed of the
control
shaft 730, imposed by the adjustment motor 700 and transmitted to the star
gear SG.
Various modifications and/or improvements may be made to the above-
described embodiments without departing from the scope of the invention as
defined by the annexed claims.
In particular, while the illustrations of Figures 1 to 3 show intaglio
printing
presses equipped with conventional inking devices, any other suitable inking
device could be used for the purpose of inking the chablon cylinders. In that
respect, the inking devices could for instance be inking devices as disclosed
in
International Publication No. WO 2005/077656 Al.
LIST OF REFERENCE NUMERALS USED THEREIN
1 (sheet-fed) intaglio printing press (first embodiment)
1* (sheet-fed) intaglio printing press (second embodiment)
2 sheet feeder
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3 intaglio printing unit (first embodiment)
3* intaglio printing unit (second embodiment)
4 sheet delivery (with three delivery pile units)
optical inspection system (e.g. NoteSave())
5 6 drying or curing unit
7 impression cylinder (three-segment cylinder)
8 intaglio cylinder (three-segment plate cylinder carrying three
intaglio
printing plates)
9 ink collecting cylinder / Orlof cylinder (three-segment blanket
cylinder ¨
first embodiment)
10 ink wiping system
11 rotating wiping roller assembly of ink wiping system 10 (contacts
circumference of intaglio cylinder 8)
11a driving head part of rotating wiping roller assembly 11
15 sheet transporting system (sheet conveyor system with a pair of
endless chains driving a plurality of spaced-apart gripper bars for
holding a leading edge of the sheets)
(five) inking devices (first embodiment)
21 ink duct (first embodiment)
20 22 ink-application rollers (first embodiment)
23 (five) chablon cylinders / selective inking cylinders transferring
ink onto
ink-collecting cylinder 9 (first embodiment)
20* (five) inking devices (second embodiment)
21* ink duct (second embodiment)
22* ink-application rollers (second embodiment)
23* (five) chablon cylinders / selective inking cylinders transferring
ink onto
plate cylinder 8 (second embodiment)
24* ink transfer rollers (second embodiment)
25 adjustable drive unit of wiping roller assembly 11
50 stationary machine frame supporting impression cylinder 7, plate
cylinder 8 and ink wiping system 10 (first embodiment)
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51 intermediate carriage supporting ink-collecting cylinder 9 and
chablon
cylinders 23 (first embodiment)
52 inking carriage supporting inking devices 20 (first embodiment)
52' inking carriage 52 in the retracted position (first embodiment)
5 55 stationary machine frame supporting impression cylinder 7, plate
cylinder 8, chablon cylinders 23* and ink wiping system 10 (second
embodiment)
56 inking carriage supporting inking devices 20* (second embodiment)
100 driving gear of wiping roller assembly 11 / input drive gear of
adjustable
10 drive unit 25
505 adjustable mechanical transmission unit / planetary gear unit
510 outer casing of planetary gear unit 505 (secured to driving gear
100)
515 lateral member of planetary gear unit 505 (secured to outer casing
510
and acting as ring gear RG of planetary gear unit 505)
15 600 intermediate member acting as planet carrier PC of planetary gear
unit
505 (supported for rotation inside outer casing 510)
605 central member secured to intermediate member 600
610 output member of adjustable drive unit 25 (acting as drive output of
adjustable drive unit 25)
615 spherical bearing between central member 605 and output member 610
700 adjustment motor (e.g. servo motor) of adjustable drive unit 25
720 worm drive interposed between output shaft of adjustment motor 700
and control input of planetary gear unit 505
730 control shaft coupled to drive output of worm drive 720 (acts as
star
gear SG of planetary gear unit 505)
800 retractable coupling mechanism
810 input member of retractable coupling mechanism 800 (secured to
output member 610)
820 slideable output member of retractable coupling mechanism 800
(coupled to driving head part lla of wiping roller assembly 11)
910 support member supporting adjustable drive unit 25 (secured to
stationary machine frame 50 or 55)
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950 support member supporting adjustment motor 700 (secured to
stationary machine frame 50 or 55)
RG ring (annular) gear of planetary gear unit 505 / acts as drive input
of
planetary gear unit 505
PG planet gears (or "planets") of planetary gear unit 505
PC planet carrier of planetary gear unit 505 / acts as drive output of
planetary gear unit 505
SG star (central) gear of planetary gear unit 505 / acts as control
input of
planetary gear unit 505
